Home / 20,862.95-28,789.29-11,909.24

Finding the Fourth Proportional to 20,862.95, 28,789.29 and 11,909.24

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Solution

The fourth proportional to 20,862.95, 28,789.29 and 11,909.24 is: 16,433.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.95 : 28,789.29 = 11,909.24 : x
  2. Step 2: Convert to fraction form
    20,862.95/28,789.29 = 11,909.24/x
  3. Step 3: Cross multiply
    20,862.95x = 28,789.29 × 11,909.24
  4. Step 4: Simplify right side
    20,862.95x = 342,858,593.66
  5. Step 5: Solve for x
    x = 342,858,593.66/20,862.95
  6. Step 6: Final answer
    x = 16,433.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.